CD3ε的多重信号作用及其在CAR-T细胞治疗中的应用
Wei Wu1, Qiuping Zhou1, Takeya Masubuchi2
1State Key Laboratory of Molecular Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai 200031, China.
Cell
|July 31, 2020
概括
在T细胞受体中的CD3ε链作为信号调器,招募抑制性激酶来控制信号传递. 这种特性通过提高持久性和抗瘤活性来增强仿真抗原受体 (CAR) - T细胞疗法.
科学领域:
- 免疫学
- 分子生物学
- 细胞信号传输
背景情况:
- T细胞受体 (TCR) 信号依赖于相关的CD3链 (ε, δ, γ, ζ) 进行抗原识别.
- 单个CD3链在调节TCR信号中的确切作用仍然不完全理解.
研究的目的:
- 在TCR刺激时对所有CD3链的免疫受体基激活基因 (ITAM) 的酸化进行定量评估.
- 研究CD3ε信号动机对仿真抗原受体 (CAR) - T细胞疗效的功能影响.
主要方法:
- 使用定量质谱法同时测量所有CD3链中的ITAM酸化.
- 化学抗原受体 (CAR) - T细胞是通过结合CD3ε细胞质域进行的.
主要成果:
- 一个CD3εITAM的子集表现出单酸化,选择性地招募Csk激酶来减弱TCR信号,显示出自我调节机制.
- 将CD3ε细胞质域纳入CAR增强了抗瘤活性.
- CD3ε的Csk招募ITAM降低了CAR- T细胞细胞因子的产生,而其基本残留丰富序列 (BRS) 则通过p85招募促进了CAR- T细胞的持久性.
结论:
- CD3ε作为T细胞信号传递的内在多功能调节器.
- 设计CD3多样性,特别是利用CD3ε的特性,为开发下一代CAR-T细胞疗法提供了有前途的策略.
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